Exogenous hormones have significant influence on fertility traits in domestic animals. Exogenous hormones have significantly influenced the scrotal circumference, testicular volume and weight, sex behavioral profiles, endocrine profiles, semen production and its quality profiles, and fertility rate. Appropriate dosage needs to be administrated to get maximum beneficial effect. This book will be very useful for the scientists working in goat reproduction, progressive goat farmers, semen biologist, breeders and farmers in goat rearing areas for enhancement of socio-economic life of livestock owners through augmentation of breeding performance of caprine species.